Device for replacing whole stay cable under limited space condition

Abstract

The utility model relates to a device for replacing the whole stay cable under the limited space condition, and relates to the technical field of bridge maintenance and reinforcement construction.The device comprises a release support used for being arranged on the outer side of the anchoring end of the stay cable in a sleeving mode; the connector is arranged on the inner side of the releasing support and used for being connected with the exposed steel strand, and the outer side of the connector is sleeved with a supporting nut; the dowel bar is used for being coaxially arranged with the stay cable, and the dowel bar penetrates through the release support and is connected with the connector; and the driving mechanism is connected with the dowel bar, and the driving mechanism is used for driving the dowel bar to move in the axis direction of the stay cable and driving the supporting nut to move in the releasing support so that the supporting nut can abut against the anchor head nut. Due to the fact that the supporting nut is unscrewed, the driving mechanism moves the dowel bar in the reverse direction, the connector stretches into the anchor head nut, the supporting nut abuts against the anchor head nut, a second supporting foot is reduced, the length of the device in the axial direction of the stay cable is reduced, and the device is more suitable for symmetrical and synchronous releasing of a single tower under the condition of limited space.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge maintenance and reinforcement construction, in particular to a device for replacing the entire cable of a stay cable under space-constrained conditions. Background Art

[0002] As an important part of the cable-stayed bridge, the stability and safety of the cable-stayed bridge are crucial to the normal operation of the entire structure. According to the original design standards, the general service life of the cable-stayed bridge is 20 years. With the continuous increase in operation volume, construction quality, vehicle overweight and natural factors, more and more cable-stayed bridges are aging or damaged, which can no longer meet the growing demand for transportation. There are cases where the structural bearing capacity reaches the design critical force and has even become a dangerous bridge that seriously affects traffic safety, requiring large-scale cable replacement of the entire bridge.

[0003] Some examples have shown that the exposed amount of the parallel steel strands at the tensioning end of the inclined cable in the early construction did not take into account the later replacement, especially for the long cable, the reserved exposed amount was far less than the elastic tensioning (elongation) length, which brought great technical difficulties to the construction; on the other hand, in order to facilitate maintenance and overhaul, a lifting operating platform or special elevator was installed at the tensioning end of the inclined cable (such as inside the tower), and the exposed steel strands at the tensioning end were further cut and shortened to free up installation space, which further affected the construction.

[0004] In the prior art, for example, the invention patent application with publication number CN109736213A, “Tooling for rapid replacement of clip group anchored steel strand cable and its dismantling construction method”, comprises a support leg I, a hollow sleeve, a support leg II, a tool nut I, a jack, a tool nut II, a tension rod, a tool anchor plate, and a tool clip; the tool clip clamps the anchored steel strand, the lower end of the hollow sleeve is tightly connected to the tool anchor plate, and the upper end is tightly connected to the tension rod; the tension rod is sequentially connected to the hollow sleeve, the support leg I, the support leg II, the tool nut I, the jack, and the tool nut II from bottom to top; the support leg I is mounted on the anchor plate; the support leg II is mounted on the support leg I; the tool nut I is arranged in the support leg II and is threadedly connected to the lower end of the tension rod; the upper end of the tension rod is provided with a jack, and the tool nut II is threadedly connected to the tension rod; the jack is driven to tension the steel strand to achieve tensioning. The present invention also provides a dismantling construction method. This tool can tension the stressed steel strands to a stress-free state.

[0005] However, the replacement tools currently in use all adopt the structure of "double support angles + double nuts + tension rods + large-tonnage jacks". This type of tooling is large in size and has many components, making it difficult to symmetrically and synchronously release a single tower under confined space conditions. Utility Model Content

[0006] The present application provides a device for replacing the entire cable of a cable-stayed cable under space-constrained conditions, which can solve the problem that the replacement tooling currently used in the prior art all adopts a structure of "double support angles + double nuts + tensioning rods + large-tonnage jacks". This type of tooling is large in size and has many components, and it is difficult to symmetrically and synchronously tension a single tower under space-constrained conditions.

[0007] In a first aspect, an embodiment of the present application provides a device for replacing a whole stay cable under space-constrained conditions, comprising:

[0008] A tension support, which is used to be sleeved on the outside of the anchor end of the inclined cable;

[0009] A connector, which is arranged inside the support and used to connect with the exposed steel strands, and a support nut is sleeved on the outside of the connector;

[0010] A force transmission rod, which is used to be coaxially arranged with the inclined cable, and the force transmission rod passes through the tensioning support and is connected to the connector;

[0011] A driving mechanism is connected to the force transmission rod, and is used to drive the force transmission rod to move along the axis direction of the inclined cable, and drive the support nut to move in the tensioning support, so that the support nut abuts against the anchor head nut.

[0012] In combination with the first aspect, in one embodiment, the connector includes:

[0013] A connecting seat, the outer side of which is provided with an external thread matching the supporting nut, the connecting seat is provided with a first threaded cavity and a second threaded cavity, the inner diameter of the first threaded cavity is smaller than the inner diameter of the second threaded cavity, and the first threaded cavity is used to connect the force transmission rod;

[0014] A steel strand connector extends into the second threaded cavity and is connected to the second threaded cavity, and the steel strand connector is used to connect the exposed steel strands.

[0015] In combination with the first aspect, in one embodiment, the steel strand connector includes:

[0016] A steel strand anchor, which is arranged in the second threaded cavity, and has a threaded section matching the second threaded cavity on the outside, and a plurality of harness holes are provided on the steel strand anchor, and the harness holes are used to allow the exposed steel strands to pass through and connect the exposed steel strands;

[0017] A compression unit is used to be arranged on the exposed steel strands and is used to make the individuals in the exposed steel strands move synchronously.

[0018] In combination with the first aspect, in one embodiment, the clamping unit includes two clamping plates spaced apart along the axial direction of the inclined cable, the clamping plates are provided with through holes corresponding to the wire harness holes, the through holes are used to allow the exposed steel strands to pass through, the two clamping plates are located at both ends of the steel strand anchor and spaced apart from the steel strand anchor, the clamping plate located on the lower side of the steel strand anchor is used to be fixed on the anchor head of the inclined cable, and the upper clamping plate is connected to the steel strand anchor.

[0019] In combination with the first aspect, in one embodiment, an extension rod is further included, and an inner anchor socket of the force transmission rod is provided at one end of the force transmission rod away from the connecting head, and the end of the extension rod is threadedly connected to the inner anchor socket of the force transmission rod.

[0020] In combination with the first aspect, in one embodiment, the extension rod includes a plurality of extension units, the extension unit includes an extension rod embedded head and an extension section connected in sequence, the extension section is provided with an extension rod internal anchor socket at one end away from the extension rod embedded head, and the extension rod embedded head is used for threaded connection with the anchor socket in the force transmission rod or the extension rod internal anchor socket.

[0021] In combination with the first aspect, in one embodiment, the support for placing a sheet includes:

[0022] A bottom plate and a top plate are arranged at intervals, wherein the bottom plate is provided with a bottom plate inner hole for the anchor head of the inclined cable to pass through, and the top plate is provided with a top plate inner hole for the force transmission rod to pass through;

[0023] A plurality of support columns are arranged between the bottom plate and the top plate and are spaced apart along the circumference of the inclined cable.

[0024] In combination with the first aspect, in one embodiment, the connection seat is provided with a plurality of first connection holes spaced apart along the circumferential direction of the inclined cable, and the first connection holes are arranged along the radial direction of the inclined cable for connecting the torque pins.

[0025] In combination with the first aspect, in one embodiment, the first connecting holes are arranged along the circumference of the first threaded cavity.

[0026] In combination with the first aspect, in one embodiment, a working nut is provided on the force transmission rod, the driving mechanism is a through-type jack, the force transmission rod passes through the middle of the driving mechanism, and the piston of the driving mechanism abuts against the working nut.

[0027] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0028] When using the device for replacing the entire cable of an inclined cable under space-constrained conditions, the tensioning support is sleeved on the outer side of the anchor end of the inclined cable, and the connecting head is arranged on the inner side of the tensioning support for connecting with the exposed steel strand. A supporting nut is sleeved on the outer side of the connecting head, and the force transmission rod is coaxially arranged with the inclined cable. The force transmission rod passes through the tensioning support and is connected to the connecting head. The driving mechanism is connected to the force transmission rod, and the driving mechanism moves the force transmission rod along the axial direction of the inclined cable to relieve the anchoring force of the anchor head nut, loosen the anchor head nut, separate the anchor head nut from the anchor head of the inclined cable, and the driving mechanism moves the force transmission rod in the reverse direction to make the support nut abut against the anchor head nut, and the driving mechanism moves along the axial direction of the inclined cable again. Move the force transmission rod in the direction to separate the anchor head nut from the support nut, loosen the support nut, and drive the force transmission rod in the reverse direction to make the connecting head extend into the anchor head nut, and the support nut abuts against the anchor head nut, and repeat until the cable force of the inclined cable is completely unloaded. Since the second support leg is reduced, the length of the device in the axial direction of the inclined cable is reduced, which is more suitable for the symmetrical and synchronous tensioning of a single tower under space-constrained conditions, and solves the problem that the replacement tooling currently used in the prior art adopts the structure of "double support angles + double nuts + tensioning rods + large-tonnage jacks". This type of tooling is large in size and has many components, and it is difficult to symmetrically and synchronously tension a single tower under space-constrained conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 The utility model is a schematic structural diagram of an embodiment of a device for replacing a whole cable of a stay cable under space-constrained conditions.

[0031] Figure 2 The utility model is a schematic diagram of the cross-sectional structure of an embodiment of a device for replacing an entire cable of a stay cable under space-constrained conditions.

[0032] Figure 3 The utility model is a schematic structural diagram of a stay cable in an embodiment of a device for replacing a whole stay cable under space-constrained conditions.

[0033] Figure 4 The utility model is a schematic structural diagram of a steel strand connector in an embodiment of a device for replacing a whole cable of a stay cable under space-constrained conditions.

[0034] Figure 5 The utility model is a schematic structural diagram of a steel strand anchor in an embodiment of a device for replacing a whole cable of a stay cable under space-constrained conditions.

[0035] Figure 6 The utility model is a schematic structural diagram of a clamping plate in an embodiment of a device for replacing a whole stay cable under space-constrained conditions.

[0036] Figure 7 The present invention is a schematic structural diagram of a support in an embodiment of a device for replacing a whole cable of a stay cable under space-constrained conditions according to the present invention.

[0037] Figure 8 It is a structural schematic diagram of a connecting seat in an embodiment of a device for replacing a whole cable of a stay cable under space-constrained conditions of the utility model.

[0038] Fig. 9 The utility model is a schematic structural diagram of a force transmission rod in an embodiment of a device for replacing a whole cable of a stay cable under space-constrained conditions.

[0039] Fig.10 The utility model is a schematic structural diagram of an extension rod in an embodiment of a device for replacing a whole cable of a stay cable under space-constrained conditions.

[0040] Fig.11 The utility model is a schematic structural diagram of a working nut in an embodiment of a device for replacing an entire stay cable under space-constrained conditions.

[0041] Fig.12 The utility model is a schematic diagram of the use environment of an embodiment of a device for replacing a whole cable of a stay cable under space-constrained conditions.

[0042] In the figure: 1. Support; 11. Bottom plate; 111. Bottom plate inner hole; 12. Top plate; 121. Top plate inner hole; 13. Support column; 2. Cable; 21. Anchor nut; 22. Exposed steel strand; 23. Cable anchor; 24. Pad; 25. Anchor pad; 26. Cable guide tube; 27. Internal steel strand; 28. Anchor seal; 3. Connector; 31. Connector; 311. External thread; 312. First thread cavity; 313. Second thread cavity; 314. First connection hole; 32. Steel strand connector; 321 , steel strand anchor; 3211, harness hole; 3212, bolt hole; 322, clamping unit; 3221, clamping plate; 3222, through hole; 3223, positioning hole; 33, anchor clip; 4, support nut; 5, force transfer rod; 51, anchor socket in force transfer rod; 52, working nut; 521, second connecting hole; 53, third connecting hole; 6, driving mechanism; 7, extension rod; 71, embedded head in extension rod; 72, extension section; 721, anchor socket in extension rod; 722, fourth connecting hole; 8, bridge tower; 9, anchor head support groove. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] The embodiments of the present application provide a device for replacing the entire cable of a cable-stayed cable under space-constrained conditions, which can solve the problem that the replacement tooling currently used in the prior art all adopts a structure of "double support angles + double nuts + tensioning rods + large-tonnage jacks". This type of tooling is large in size and has many components, and it is difficult to symmetrically and synchronously tension a single tower under space-constrained conditions.

[0045] like Figure 1 and Figure 3 As shown, in the prior art, the cable-stayed cable 2 includes a cable guide tube 26 arranged in the bridge tower 8, and an anchor head sealing cylinder 28 inside the cable guide tube 26, an anchor pad 25 is located at the end of the anchor head sealing cylinder 28, and divides the steel strands into built-in steel strands 27 and exposed steel strands 22, the anchor pad 25 is arranged at the anchor head supporting groove 9, the cable-stayed cable anchor head 23 extends out of the anchor pad 25, an anchor head nut 21 is arranged on the cable-stayed cable anchor head 23, and a cushion block 24 is arranged between the anchor head nut 21 and the anchor pad 25.

[0046] like Figure 1 , Figure 2 and Fig.12 As shown, on the one hand, the present application provides a device for replacing the entire cable of a stay cable under space-constrained conditions, which comprises:

[0047] A support 1 is provided, which is used to be sleeved on the outside of the anchor end of the inclined cable 2;

[0048] A connector 3 is provided inside the support 1 and is used to connect with the exposed steel strand 22. A support nut 4 is sleeved on the outside of the connector 3.

[0049] The force transmission rod 5 is used to be coaxially arranged with the inclined cable 2. The force transmission rod 5 passes through the tensioning support 1 and is connected to the connector 3;

[0050] The driving mechanism 6 is connected to the force transmission rod 5 , and is used to drive the force transmission rod 5 to move along the axial direction of the inclined cable 2 , and drive the support nut 4 to move in the tensioning support 1 , so that the support nut 4 abuts against the anchor nut 21 .

[0051] When using the device for replacing the entire cable of the inclined cable under space-constrained conditions, the tensioning support 1 is sleeved on the outer side of the anchor end of the inclined cable 2, and the connecting head 3 is arranged on the inner side of the tensioning support 1 for connecting with the exposed steel strand 22. The outer side of the connecting head 3 is sleeved with a supporting nut 4, and the force transmission rod 5 is coaxially arranged with the inclined cable 2. The force transmission rod 5 passes through the tensioning support 1 and is connected with the connecting head 3. The driving mechanism 6 is connected to the force transmission rod 5. The driving mechanism 6 moves the force transmission rod 5 along the axial direction of the inclined cable 2 to remove the anchoring force of the anchor head nut 21, loosen the anchor head nut 21, separate the anchor head nut 21 from the anchor head 23 of the inclined cable, and the driving mechanism 6 moves the force transmission rod 5 in the reverse direction to make the support nut 4 abut against the anchor head nut 21. 6 Move the force transmission rod 5 along the axial direction of the inclined cable 2 again to separate the anchor nut 21 from the support nut 4, loosen the support nut 4, and drive the force transmission rod 5 in the opposite direction to make the connector 3 extend into the anchor nut 21, and the support nut 4 abuts against the anchor nut 21, and repeat until the cable force of the inclined cable 2 is completely unloaded. Since the second support leg is reduced, the length of the device in the axial direction of the inclined cable 2 is reduced, which is more suitable for the symmetrical and synchronous tensioning of a single tower under space-constrained conditions, and solves the problem that the replacement tooling currently used in the prior art adopts the structure of "double support angles + double nuts + tensioning rods + large-tonnage jacks". This type of tooling is large in size and has many components, and it is difficult to symmetrically and synchronously tension a single tower under space-constrained conditions.

[0052] like Fig. 9 As shown, in this example, a third connecting hole 53 is provided at the end of the force transmission rod 5 for connecting a turning nail, so that the operator can rotate the force transmission rod 5 through the turning nail to facilitate threaded installation.

[0053] In this example, unscrewing refers to moving away from the anchor plate 25 along the axial direction of the stay cable 2 .

[0054] like Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, in some optional embodiments, the connector 3 includes:

[0055] The connecting seat 31 has an outer thread 311 on its outer side that matches the supporting nut 4. The connecting seat 31 has a first thread cavity 312 and a second thread cavity 313 inside. The inner diameter of the first thread cavity 312 is smaller than the inner diameter of the second thread cavity 313. The first thread cavity 312 is used to connect the force transmission rod 5.

[0056] The steel strand connector 32 extends into the second threaded cavity 313 and is connected to the second threaded cavity 313 . The steel strand connector 32 is used to connect the exposed steel strands 22 .

[0057] In this embodiment, the structure of the connector 3 is specifically described. The connector 3 includes a connecting seat 31 and a steel strand connector 32, wherein an external thread 311 matching the support nut 4 is provided on the outer side of the connecting seat 31, and a first threaded cavity 312 and a second threaded cavity 313 are provided in the connecting seat 31. The inner diameter of the first threaded cavity 312 is smaller than the inner diameter of the second threaded cavity 313. The first threaded cavity 312 is used to connect the force transmission rod 5. The steel strand connector 32 extends into the second threaded cavity 313 and is connected to the second threaded cavity 313. The steel strand connector 32 is used to connect the exposed steel strands 22. It has a simple structure and a better connection effect with the exposed steel strands 22.

[0058] In this example, the outer diameter of the connection seat 31 is smaller than the outer diameter of the stay cable anchor head 23 .

[0059] like Figure 2 , Figure 4 , Figure 5 and Figure 8 As shown, in some optional embodiments, the steel strand connector 32 includes:

[0060] The steel strand anchor 321 is disposed in the second threaded cavity 313, and a threaded section matching the second threaded cavity 313 is disposed on the outer side. The steel strand anchor 321 is provided with a plurality of harness holes 3211, and the harness holes 3211 are used to allow the exposed steel strands 22 to pass through and connect the exposed steel strands 22;

[0061] The pressing unit 322 is used to be arranged on the exposed steel strands 22 to enable the individuals in the exposed steel strands 22 to move synchronously.

[0062] In this embodiment, the structure of the steel strand connector 32 is specifically described. The steel strand connector 32 includes a steel strand anchor 321 and a clamping unit 322, wherein the steel strand anchor 321 is arranged in the second threaded cavity 313, and a threaded section matching the second threaded cavity 313 is provided on the outside, and a plurality of harness holes 3211 are provided on the steel strand anchor 321, and the harness holes 3211 are used to allow the exposed steel strands 22 to pass through and connect the exposed steel strands 22. The clamping unit 322 is arranged on the exposed steel strands 22, and is used to make the individuals in the exposed steel strands 22 move synchronously, so as to avoid the slipping of the anchor clip 33 on the partially exposed steel strands 22 when the whole cable is pulled, resulting in the inability to pull the inclined cable anchor head 23, and then making the anchor head nut 21 difficult to screw, causing the situation that it cannot be unloaded, and eliminating certain safety hazards.

[0063] like Figure 2 , Figure 4 and Figure 6As shown, in some optional embodiments, the clamping unit 322 includes two clamping plates 3221 spaced apart along the axial direction of the inclined cable 2, and the clamping plates 3221 are provided with through holes 3222 corresponding to the harness holes 3211, and the through holes 3222 are used to allow the exposed steel strands 22 to pass through, and the two clamping plates 3221 are located at both ends of the steel strand anchor 321 and spaced apart from the steel strand anchor 321, and the clamping plate 3221 located on the lower side of the steel strand anchor 321 is used to be fixed on the inclined cable anchor head 23, and the upper clamping plate 3221 is connected to the steel strand anchor 321.

[0064] In this embodiment, the specific structure of the clamping unit 322 is described. The clamping unit 322 includes two clamping plates 3221 spaced apart along the axial direction of the inclined cable 2. The clamping plates 3221 are provided with through holes 3222 corresponding to the harness holes 3211. The through holes 3222 are used to allow the exposed steel strands 22 to pass through. The two clamping plates 3221 are located at both ends of the steel strand anchor 321 and are spaced apart from the steel strand anchor 321. The clamping plate 3221 located at the lower side of the steel strand anchor 321 is used to be fixed on the inclined cable anchor head 23, and the upper clamping plate 3221 is connected to the steel strand anchor 321, with good clamping effect and simple installation process.

[0065] like Figure 5 and Figure 6 As shown, in this example, a positioning hole 3223 is provided on the clamping plate 3221, and a bolt hole 3212 is provided on the steel strand anchor 321. The positioning hole 3223 cooperates with the bolt hole 3212 for positioning. The positioning hole 3223 can also facilitate positioning of the clamping plate 3221 on the inclined cable anchor head 23.

[0066] like Figure 1 and Fig. 9 As shown, in some optional embodiments, an extension rod 7 is further included, and an inner anchor socket 51 of the force transmission rod is provided at one end of the force transmission rod 5 away from the connecting head 3, and the end of the extension rod 7 is threadedly connected to the inner anchor socket 51 of the force transmission rod.

[0067] In the present embodiment, the device for replacing the entire cable of the inclined cable under space-constrained conditions also includes an extension rod 7. The end of the force transmission rod 5 away from the connecting head 3 is provided with an anchor socket 51 in the force transmission rod. The end of the extension rod 7 is threadedly connected to the anchor socket 51 in the force transmission rod to prevent the length of the force transmission rod 5 from being insufficient to release the cable force in the inclined cable 2, thereby improving the applicability of the device for replacing the entire cable of the inclined cable under space-constrained conditions.

[0068] like Figure 1 , Fig. 9 and Fig.10As shown, in some optional embodiments, the extension rod 7 includes a plurality of extension units, the extension units include an extension rod embedded head 71 and an extension section 72 connected in sequence, an extension rod internal anchor socket 721 is provided at one end of the extension section 72 away from the extension rod embedded head 71, and the extension rod embedded head 71 is used for threaded connection with the anchor socket 51 in the force transmission rod or the anchor socket 721 in the extension rod.

[0069] In this embodiment, the specific structure of the extension rod 7 is explained. The extension rod 7 includes a plurality of extension units. The extension unit includes an extension rod embedded head 71 and an extension section 72 connected in sequence. The extension section 72 is provided with an extension rod internal anchor socket 721 at one end away from the extension rod embedded head 71. The extension rod embedded head 71 is used for threaded connection with the anchor socket 51 in the force transmission rod or the extension rod internal anchor socket 721. By unitizing the extension rod 7, the length of the extension rod 7 can be easily adjusted, thereby further improving the applicability of the device for replacing the entire cable of the inclined cable under space-constrained conditions.

[0070] In this example, a fourth connecting hole 722 is provided on the extension section 72 for connecting a turning nail, so that the operator can rotate the extension section 72 through the turning nail to facilitate threaded installation.

[0071] like Figure 1 , Figure 2 and Figure 7 As shown, in some optional embodiments, the support 1 includes:

[0072] A bottom plate 11 and a top plate 12 are arranged at intervals, the bottom plate 11 is provided with a bottom plate inner hole 111 for the inclined cable anchor head 23 to pass through, and the top plate 12 is provided with a top plate inner hole 121 for the force transmission rod 5 to pass through;

[0073] A plurality of support columns 13 are disposed between the bottom plate 11 and the top plate 12 and are spaced apart along the circumferential direction of the inclined cable 2 .

[0074] In this embodiment, the structure of the tensioning support 1 is specifically described. The tensioning support 1 includes a bottom plate 11, a top plate 12 and a plurality of support columns 13, wherein the bottom plate 11 and the top plate 12 are spaced apart, the bottom plate 11 is provided with a bottom plate inner hole 111 for the inclined cable anchor head 23 to pass through, the top plate 12 is provided with a top plate inner hole 121 for the force transmission rod 5 to pass through, a plurality of support columns 13 are arranged between the bottom plate 11 and the top plate 12, and are spaced apart circumferentially along the inclined cable 2, the structure is simple and stable, and it is easy to install.

[0075] In this example, the support column 13 is disposed around the anchor nut 21 to limit the position of the anchor nut 21 .

[0076] like Figure 8As shown, in some optional embodiments, the connection seat 31 is provided with a plurality of first connection holes 314 spaced apart along the circumferential direction of the inclined cable 2, and the first connection holes 314 are arranged along the radial direction of the inclined cable 2 for connecting the torque nails.

[0077] In this embodiment, a plurality of first connection holes 314 are provided on the connection seat 31 and are arranged at intervals along the circumferential direction of the inclined cable 2. The first connection holes 314 are arranged along the radial direction of the inclined cable 2 and are used to connect the turning nails, so that the operator can rotate the connection seat 31 through the turning nails to facilitate threaded installation.

[0078] like Figure 8 As shown, in some optional embodiments, the first connecting holes 314 are arranged circumferentially along the first threaded cavity 312 .

[0079] In this embodiment, the first connecting hole 314 is arranged along the circumference of the first threaded cavity 312. Since the inner diameter of the first threaded cavity 312 is smaller than the inner diameter of the second threaded cavity 313, the first connecting hole 314 is arranged along the circumference of the first threaded cavity 312, which has little effect on the structural stability of the connecting seat 31, thereby improving the structural stability of the device for replacing the entire cable of the inclined cable under space-constrained conditions.

[0080] like Figure 1 , Figure 2 and Fig.11 As shown, in some optional embodiments, a working nut 52 is provided on the force transmission rod 5 , the driving mechanism 6 is a through-type jack, the force transmission rod 5 passes through the middle of the driving mechanism 6 , and the piston of the driving mechanism 6 abuts against the working nut 52 .

[0081] In this embodiment, a working nut 52 is provided on the force transmission rod 5, the driving mechanism 6 is a through-type jack, the force transmission rod 5 passes through the middle of the driving mechanism 6, and the piston of the driving mechanism 6 abuts against the working nut 52. The structure is simple and it is convenient to move the force transmission rod 5 along the axial direction of the inclined cable 2.

[0082] In this example, the working nut 52 is provided with a plurality of second connection holes 521 arranged along the circumferential direction for connecting the turning pins, so that the operator can turn the working nut 52 through the turning pins to facilitate threaded installation.

[0083] like Figure 1 , Figure 2 and Fig.12 As shown, on the other hand, the present application also provides a method for replacing a stay cable under space-constrained conditions, which is implemented using the above-mentioned device for replacing a stay cable under space-constrained conditions, and includes the following steps:

[0084] S1: the driving mechanism 6 moves the force transmission rod 5 along the axial direction of the inclined cable 2, so that the anchor nut 21 releases the anchoring force, the anchor nut 21 is loosened, and the anchor nut 21 is separated from the inclined cable anchor head 23. The driving mechanism 6 moves the force transmission rod 5 in the reverse direction, so that the support nut 4 abuts against the anchor nut 21.

[0085] S2: the driving mechanism 6 moves the force transmission rod 5 along the axial direction of the inclined cable 2 to separate the anchor nut 21 from the support nut 4, loosen the support nut 4, and the driving mechanism 6 moves the force transmission rod 5 in the opposite direction to make the connecting head 3 extend into the anchor nut 21, and the support nut 4 abuts against the anchor nut 21, and repeats until the cable force of the inclined cable 2 is completely unloaded.

[0086] When using the device for replacing the entire cable of the inclined cable under space-constrained conditions, the tensioning support 1 is sleeved on the outer side of the anchor end of the inclined cable 2, and the connecting head 3 is arranged on the inner side of the tensioning support 1 for connecting with the exposed steel strand 22. The outer side of the connecting head 3 is sleeved with a supporting nut 4, and the force transmission rod 5 is coaxially arranged with the inclined cable 2. The force transmission rod 5 passes through the tensioning support 1 and is connected with the connecting head 3. The driving mechanism 6 is connected to the force transmission rod 5. The driving mechanism 6 moves the force transmission rod 5 along the axial direction of the inclined cable 2 to remove the anchoring force of the anchor head nut 21, loosen the anchor head nut 21, separate the anchor head nut 21 from the anchor head 23 of the inclined cable, and the driving mechanism 6 moves the force transmission rod 5 in the reverse direction to make the support nut 4 abut against the anchor head nut 21. 6 Move the force transmission rod 5 along the axial direction of the inclined cable 2 again to separate the anchor nut 21 from the support nut 4, loosen the support nut 4, and drive the force transmission rod 5 in the opposite direction to make the connector 3 extend into the anchor nut 21, and the support nut 4 abuts against the anchor nut 21, and repeat until the cable force of the inclined cable 2 is completely unloaded. Since the second support leg is reduced, the length of the device in the axial direction of the inclined cable 2 is reduced, which is more suitable for the symmetrical and synchronous tensioning of a single tower under space-constrained conditions, and solves the problem that the replacement tooling currently used in the prior art adopts the structure of "double support angles + double nuts + tensioning rods + large-tonnage jacks". This type of tooling is large in size and has many components, and it is difficult to symmetrically and synchronously tension a single tower under space-constrained conditions.

[0087] In this example, before step S1, the method also includes moving the force transmission rod 5 along the axial direction of the inclined cable 2 by the driving mechanism 6, each time by 0.5-1 cm, eliminating the influence of the shock absorber resistance in the cable guide tube 26 on the measured cable force, taking the average value as the initial cable force, and moving the force transmission rod 5 along the axial direction of the inclined cable 2 again to separate the anchor head nut 21 from the cushion block 24, loosening the anchor head nut 21 until it is flush with the end of the inclined cable anchor head 23, removing the cushion block 24, and driving the mechanism 6 to move the force transmission rod 5 in the opposite direction to make the anchor head nut 21 abut against the anchor pad 25.

[0088] In this example, after each release, the load is held for 5 minutes, and the amount of retraction of the cable anchor head 23 or the force transmission rod 5 into the cable guide tube 26 is measured to ensure that the cable force each time is released is consistent with the axial retraction length.

[0089] In this example, the driving mechanism 6 moves the force transmission rod 5 along the axial direction of the inclined cable 2 , and the driving mechanism 6 pushes the force transmission rod 5 upward, and the reverse direction is to lower the force transmission rod 5 along the axial direction of the inclined cable 2 .

[0090] In some optional embodiments, the driving mechanism 6 moves the force transmission rod 5 along the axial direction of the inclined cable 2 so that the anchor nut 21 releases the anchoring force, including:

[0091] Loosen the working nut 52 by a stroke length no greater than that of the driving mechanism 6;

[0092] Tighten the oil outlet cylinder of the driving mechanism 6 against the working nut 52;

[0093] The driving mechanism 6 moves the force transmission rod 5 along the axial direction of the inclined cable 2, so that the anchor head nut 21 releases the anchoring force.

[0094] In this embodiment, the working nut 52 is loosened by a length not greater than the stroke length of the driving mechanism 6, the oil outlet cylinder of the driving mechanism 6 is tightened against the working nut 52, and the driving mechanism 6 moves the force transmission rod 5 along the axial direction of the inclined cable 2 to remove the anchoring force of the anchor head nut 21. Since the stroke of the driving mechanism 6 is limited, the working nut 52 is loosened in advance by a length not greater than the stroke length of the driving mechanism 6, which can increase the length of one release and improve the release efficiency.

[0095] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0096] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0097] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A device for replacing a whole stay cable under space-constrained conditions, characterized in that: include: A tensioning support (1) is used to be sleeved on the outside of the anchoring end of the inclined cable (2); A connector (3) is arranged inside the tensioning support (1) and is used to connect with the exposed steel strand (22), and a support nut (4) is sleeved on the outside of the connector (3); A force transmission rod (5) is used to be coaxially arranged with the inclined cable (2), and the force transmission rod (5) passes through the tensioning support (1) and is connected to the connecting head (3); A driving mechanism (6) is connected to the force transmission rod (5), and is used to drive the force transmission rod (5) to move along the axial direction of the inclined cable (2), and drive the support nut (4) to move in the tensioning support (1), so that the support nut (4) abuts against the anchor head nut (21).

2. The device for replacing a whole stay cable under space-constrained conditions as claimed in claim 1, characterized in that: The connector (3) comprises: A connecting seat (31), the outer side of which is provided with an external thread (311) matching the supporting nut (4), the connecting seat (31) is provided with a first threaded cavity (312) and a second threaded cavity (313), the inner diameter of the first threaded cavity (312) is smaller than the inner diameter of the second threaded cavity (313), and the first threaded cavity (312) is used to connect the force transmission rod (5); A steel strand connector (32) extends into the second threaded cavity (313) and is connected to the second threaded cavity (313), wherein the steel strand connector (32) is used to connect the exposed steel strands (22).

3. The device for replacing a whole stay cable under space-constrained conditions as claimed in claim 2, characterized in that: The steel strand connector (32) comprises: A steel strand anchor (321), which is arranged in the second threaded cavity (313), and has a threaded section matching the second threaded cavity (313) on the outside, and a plurality of harness holes (3211) are provided on the steel strand anchor (321), and the harness holes (3211) are used to allow the exposed steel strands (22) to pass through and connect the exposed steel strands (22); A pressing unit (322) is used to be arranged on the exposed steel strands (22) and is used to make the individuals in the exposed steel strands (22) move synchronously.

4. The device for replacing a whole stay cable under space-constrained conditions as claimed in claim 3, characterized in that: The clamping unit (322) comprises two clamping plates (3221) arranged at intervals along the axial direction of the inclined cable (2); the clamping plate (3221) is provided with a through hole (3222) corresponding to the wire harness hole (3211); the through hole (3222) is used to allow the exposed steel strand (22) to pass through; the two clamping plates (3221) are located at both ends of the steel strand anchor (321) and are arranged at intervals from the steel strand anchor (321); the clamping plate (3221) located at the lower side of the steel strand anchor (321) is used to be fixed on the inclined cable anchor head (23); the clamping plate (3221) on the upper side is connected to the steel strand anchor (321).

5. The device for replacing the entire stay cable under space-constrained conditions as claimed in claim 2, characterized in that: It also comprises an extension rod (7), wherein an inner anchor socket (51) of the force transmission rod is provided at one end of the force transmission rod (5) away from the connecting head (3), and the end of the extension rod (7) is threadedly connected to the inner anchor socket (51) of the force transmission rod.

6. The device for replacing the entire stay cable under space-constrained conditions as claimed in claim 5, characterized in that: The extension rod (7) comprises a plurality of extension units, wherein the extension units comprise an extension rod internal embedded head (71) and an extension section (72) connected in sequence, wherein an extension rod internal anchor socket (721) is provided at one end of the extension section (72) away from the extension rod internal embedded head (71), and the extension rod internal embedded head (71) is used for being threadedly connected to the force transmission rod internal anchor socket (51) or the extension rod internal anchor socket (721).

7. The device for replacing a whole stay cable under space-constrained conditions as claimed in claim 2, characterized in that: The support (1) comprises: A bottom plate (11) and a top plate (12) are arranged at intervals, wherein the bottom plate (11) is provided with a bottom plate inner hole (111) for the inclined cable anchor head (23) to pass through, and the top plate (12) is provided with a top plate inner hole (121) for the force transmission rod (5) to pass through; A plurality of support columns (13) are arranged between the bottom plate (11) and the top plate (12), and are arranged at intervals along the circumference of the inclined cable (2).

8. The device for replacing a whole stay cable under space-constrained conditions as claimed in claim 2, characterized in that: The connection seat (31) is provided with a plurality of first connection holes (314) arranged at intervals along the circumferential direction of the inclined cable (2); the first connection holes (314) are arranged along the radial direction of the inclined cable (2) and are used for connecting a torque nail.

9. The device for replacing a whole stay cable under space-constrained conditions as claimed in claim 8, characterized in that: The first connecting holes (314) are arranged along the circumference of the first threaded cavity (312).

10. The device for replacing a whole stay cable under space-constrained conditions as claimed in claim 1, characterized in that: The force transmission rod (5) is provided with a working nut (52); the driving mechanism (6) is a through-type jack; the force transmission rod (5) passes through the middle of the driving mechanism (6); and the piston of the driving mechanism (6) abuts against the working nut (52).

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